1803 – Marbury vs Madsen
Decided in 1803, Marbury is regarded as the single most important
decision in American constitutional law set the precedence for the near total power of today’s supreme court. It created the the ability of the Supreme Court to declare all laws written by congress unconstitutional and therefore invalid.
Under the Supreme Court’s ruling in Marbury v. Madison, United States federal courts have the authority to judicially review the statutes enacted by Congress, and declare a statute invalid if it violates the Constitution in the courts opinion.
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